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(Article of periodic en Anglais - 2009)

Document title

Past permafrost on the Mid-Atlantic Coastal Plain, Eastern United States

Authors(s) and Affiliation(s)

FRENCH H. (1 4 2) ; DEMITROFF M. (2) ; NEWELL W.L. (3) ;
(1) Dep. of Geography and Earth Sciences, Univ. Ontario, Ottawa, CANADA
(2) Permafrost Group, dep. of Geography, Univ. of Delaware, ETATS-UNIS
(3) Eastern Earth Surfaces Process Team, U.S. Geological Survey, Virginia, ETATS-UNIS
(4) Dep. of Geography, Univ. BC, Victoria, CANADA

Abstract

This paper summarises field observations between 2002 and 2007 that suggest past permafrost and past conditions of deep seasonal frost existed on the Mid-Atlantic Coastal Plain during the cold periods of the Late Pleistocene. A widespread pre-existing fragipan is congruent with the inferred palaeo-permafrost table. The high bulk density of the fragipan was probably enhanced by either thaw consolidation when icy permafrost degraded at the active layer-permafrost interface or by liquefaction and compaction when deep seasonal frost thawed

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2009, vol. 20, no3 [pp. 285-294]

Bibliographic references : 1,5 p.

Collation : 4 fig.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.659

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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